- Aug 2, 2005
- Ocala, Florida
If I plan on running 15w50 Mobil 1 EP exclusively, is there any reason I can't break in a solid flat tappet cam on it? Long story short - 8.6:1 compression, aluminum headed 3.1L GM motor, with a T61 huffing 10psi currently into it (oil cooled only) and going to be running a solid flat tappet cam (215/215º @ .050", .435/.435" lift), and this motor will see 7200rpm at least 3 times a day, lol. I'm trying to figure out what I should do, as far as oil is concerned. I was thinking of breaking it in on Rotella 15w40, drain that after cam break in, and fill it with M1 15w50. Now, I don't know much about oils, but I'm worried about the reduction of zinc levels. I've always run 50 weight oil with my turbo 3.1, as I was under the impression it would survive the head better. Is this so? What would you guys run, if you were in my shoes?